Not in my opinion. I don't consider it a sport.
Even if I did, I think there's too much variance. I like to think that Olympic champion of a sport is the best, or at least one of the very best. In poker, players can have lucky tournaments. Having said that, golf is at the Olympics and results can vary a lot from tournament to tournament with that too.
I also like the idea that the Olympics should be the pinnacle of a sport, the one that everyone wants to win more than anything else. It's true of athletics (track and field), swimming, weightlifting, amateur boxing, gymnastics, rowing, track cycling and some more, but not all the sports that are there to be fair. Everyone would still rather win the WSOP main event if poker was at the Olympics even it would be fun.